Glycogen in rat liver

Does someone know what is the % (w/w) of glycogen in a normal, well-fed
rat liver? If you know, I would like the % and the complete reference.
Please, don't hesitate to e-mail me at be791879 at merlin.si.uqam.ca if
you want more infos.
Thanks a lot,
Alain Renaud
Bacc. Biochimie
UQAM